Since the depth of FIR in the sliced banana was expected to be in
the range of 1–3 mm (Abe and Afzal, 1997; Sandu, 1986), the penetration
depth was assumed to be 2 mm in this work.Heat transfer
coefficient (hc) was calculated from the experimental data (Swasdisevi
et al., 2007) during the constant drying rate period and is given as